P3

Cards (12)

What is current?
The rate of flow of charge
How fast it moves around a circuit
What is resistance?
How hard it is to move
Why can’t current flow through a diode in the reverse direction?
It has a very high resistance
What determines how much energy and appliance uses?
How long it is switched on for
How powerful it is
Units for potential difference
Volts
What is the rule of fuses?
Work out the current and choose the next fuse up
They come in 3A, 5A and 13A
What happens to the current in parallel circuits?
Increases
What happens to the voltage in parallel circuits?
Stays the same
What is potential difference?
How much energy is carried
What happens to the current in series circuits?
Stays the same
What happens to the voltage in series circuits?
Decreases
Units for resistance
Ohms